Prenatal Growth & Functional Development Flashcards

1
Q

Stages of prenatal growth

A

Period of the egg
period of the embryo
period of the fetus (longest)

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2
Q

Cell division in the period of the egg

A

*first 2wks after fertilization
1- Morula
2- blastocyst
3- implantation
4- Differentiation of cellular layers

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3
Q

Millestones in period of embryo

A
  • wks 3-8
    -differentiation of stem cells into specific cell types
    -organization of cell types into tissues –>organs
    -by end of period all basic anatomic and physiologic features established
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4
Q

Differentiation of stem cells into specific cell types

A
  • totipotent (whole)
  • Pluripotent (many)
  • Multipotent (several)
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5
Q

Targets in period of the fetus

A

*wks 9-40
- changes in proportions
- functional dev of
1- tissues
2- organs
3- systems

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6
Q

growth characteristics

A

sigmoid curve
10-12% birth weight wk 20
50% length wk 20

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7
Q

What period features major changes in proportions of body segment

A

Fetal period
- head
- trunk
- lower extremities

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8
Q

Fetal motor activity gestational age specific

A
  • neuromuscular changes, primary reflexes,
    muscle tone,
    reactivity,
    Motility
    sensorimotor behaviour
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9
Q

what wks they start to move

A

wk 12
kick wk 20

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